/* SPDX-License-Identifier: BSD-3-Clause * Copyright(c) 2020 Intel Corporation */ #include #include #include #include "base/i40e_prototype.h" #include "base/i40e_type.h" #include "i40e_ethdev.h" #include "i40e_rxtx.h" #include "i40e_rxtx_vec_common.h" #include #ifndef __INTEL_COMPILER #pragma GCC diagnostic ignored "-Wcast-qual" #endif #define RTE_I40E_DESCS_PER_LOOP_AVX 8 static inline void i40e_rxq_rearm(struct i40e_rx_queue *rxq) { int i; uint16_t rx_id; volatile union i40e_rx_desc *rxdp; struct i40e_rx_entry *rxep = &rxq->sw_ring[rxq->rxrearm_start]; struct rte_mempool_cache *cache = rte_mempool_default_cache(rxq->mp, rte_lcore_id()); rxdp = rxq->rx_ring + rxq->rxrearm_start; /* We need to pull 'n' more MBUFs into the software ring from mempool * We inline the mempool function here, so we can vectorize the copy * from the cache into the shadow ring. */ if (cache->len < RTE_I40E_RXQ_REARM_THRESH) { /* No. Backfill the cache first, and then fill from it */ uint32_t req = RTE_I40E_RXQ_REARM_THRESH + (cache->size - cache->len); /* How many do we require * i.e. number to fill the cache + the request */ int ret = rte_mempool_ops_dequeue_bulk(rxq->mp, &cache->objs[cache->len], req); if (ret == 0) { cache->len += req; } else { if (rxq->rxrearm_nb + RTE_I40E_RXQ_REARM_THRESH >= rxq->nb_rx_desc) { __m128i dma_addr0; dma_addr0 = _mm_setzero_si128(); for (i = 0; i < RTE_I40E_DESCS_PER_LOOP; i++) { rxep[i].mbuf = &rxq->fake_mbuf; _mm_store_si128 ((__m128i *)&rxdp[i].read, dma_addr0); } } rte_eth_devices[rxq->port_id].data->rx_mbuf_alloc_failed += RTE_I40E_RXQ_REARM_THRESH; return; } } const __m512i iova_offsets = _mm512_set1_epi64 (offsetof(struct rte_mbuf, buf_iova)); const __m512i headroom = _mm512_set1_epi64(RTE_PKTMBUF_HEADROOM); #ifndef RTE_LIBRTE_I40E_16BYTE_RX_DESC /* to shuffle the addresses to correct slots. Values 4-7 will contain * zeros, so use 7 for a zero-value. */ const __m512i permute_idx = _mm512_set_epi64(7, 7, 3, 1, 7, 7, 2, 0); #else const __m512i permute_idx = _mm512_set_epi64(7, 3, 6, 2, 5, 1, 4, 0); #endif /* Initialize the mbufs in vector, process 8 mbufs in one loop, taking * from mempool cache and populating both shadow and HW rings */ for (i = 0; i < RTE_I40E_RXQ_REARM_THRESH / 8; i++) { const __m512i mbuf_ptrs = _mm512_loadu_si512 (&cache->objs[cache->len - 8]); _mm512_store_si512(rxep, mbuf_ptrs); /* gather iova of mbuf0-7 into one zmm reg */ const __m512i iova_base_addrs = _mm512_i64gather_epi64 (_mm512_add_epi64(mbuf_ptrs, iova_offsets), 0, /* base */ 1 /* scale */); const __m512i iova_addrs = _mm512_add_epi64(iova_base_addrs, headroom); #ifndef RTE_LIBRTE_I40E_16BYTE_RX_DESC const __m512i iovas0 = _mm512_castsi256_si512 (_mm512_extracti64x4_epi64(iova_addrs, 0)); const __m512i iovas1 = _mm512_castsi256_si512 (_mm512_extracti64x4_epi64(iova_addrs, 1)); /* permute leaves desc 2-3 addresses in header address slots 0-1 * but these are ignored by driver since header split not * enabled. Similarly for desc 4 & 5. */ const __m512i desc_rd_0_1 = _mm512_permutexvar_epi64 (permute_idx, iovas0); const __m512i desc_rd_2_3 = _mm512_bsrli_epi128(desc_rd_0_1, 8); const __m512i desc_rd_4_5 = _mm512_permutexvar_epi64 (permute_idx, iovas1); const __m512i desc_rd_6_7 = _mm512_bsrli_epi128(desc_rd_4_5, 8); _mm512_store_si512((void *)rxdp, desc_rd_0_1); _mm512_store_si512((void *)(rxdp + 2), desc_rd_2_3); _mm512_store_si512((void *)(rxdp + 4), desc_rd_4_5); _mm512_store_si512((void *)(rxdp + 6), desc_rd_6_7); #else /* permute leaves desc 4-7 addresses in header address slots 0-3 * but these are ignored by driver since header split not * enabled. */ const __m512i desc_rd_0_3 = _mm512_permutexvar_epi64 (permute_idx, iova_addrs); const __m512i desc_rd_4_7 = _mm512_bsrli_epi128(desc_rd_0_3, 8); _mm512_store_si512((void *)rxdp, desc_rd_0_3); _mm512_store_si512((void *)(rxdp + 4), desc_rd_4_7); #endif rxep += 8, rxdp += 8, cache->len -= 8; } rxq->rxrearm_start += RTE_I40E_RXQ_REARM_THRESH; if (rxq->rxrearm_start >= rxq->nb_rx_desc) rxq->rxrearm_start = 0; rxq->rxrearm_nb -= RTE_I40E_RXQ_REARM_THRESH; rx_id = (uint16_t)((rxq->rxrearm_start == 0) ? (rxq->nb_rx_desc - 1) : (rxq->rxrearm_start - 1)); /* Update the tail pointer on the NIC */ I40E_PCI_REG_WC_WRITE(rxq->qrx_tail, rx_id); } #ifndef RTE_LIBRTE_I40E_16BYTE_RX_DESC /* Handles 32B descriptor FDIR ID processing: * rxdp: receive descriptor ring, required to load 2nd 16B half of each desc * rx_pkts: required to store metadata back to mbufs * pkt_idx: offset into the burst, increments in vector widths * desc_idx: required to select the correct shift at compile time */ static inline __m256i desc_fdir_processing_32b(volatile union i40e_rx_desc *rxdp, struct rte_mbuf **rx_pkts, const uint32_t pkt_idx, const uint32_t desc_idx) { /* 32B desc path: load rxdp.wb.qword2 for EXT_STATUS and FLEXBH_STAT */ __m128i *rxdp_desc_0 = (void *)(&rxdp[desc_idx + 0].wb.qword2); __m128i *rxdp_desc_1 = (void *)(&rxdp[desc_idx + 1].wb.qword2); const __m128i desc_qw2_0 = _mm_load_si128(rxdp_desc_0); const __m128i desc_qw2_1 = _mm_load_si128(rxdp_desc_1); /* Mask for FLEXBH_STAT, and the FDIR_ID value to compare against. The * remaining data is set to all 1's to pass through data. */ const __m256i flexbh_mask = _mm256_set_epi32(-1, -1, -1, 3 << 4, -1, -1, -1, 3 << 4); const __m256i flexbh_id = _mm256_set_epi32(-1, -1, -1, 1 << 4, -1, -1, -1, 1 << 4); /* Load descriptor, check for FLEXBH bits, generate a mask for both * packets in the register. */ __m256i desc_qw2_0_1 = _mm256_inserti128_si256(_mm256_castsi128_si256(desc_qw2_0), desc_qw2_1, 1); __m256i desc_tmp_msk = _mm256_and_si256(flexbh_mask, desc_qw2_0_1); __m256i fdir_mask = _mm256_cmpeq_epi32(flexbh_id, desc_tmp_msk); __m256i fdir_data = _mm256_alignr_epi8(desc_qw2_0_1, desc_qw2_0_1, 12); __m256i desc_fdir_data = _mm256_and_si256(fdir_mask, fdir_data); /* Write data out to the mbuf. There is no store to this area of the * mbuf today, so we cannot combine it with another store. */ const uint32_t idx_0 = pkt_idx + desc_idx; const uint32_t idx_1 = pkt_idx + desc_idx + 1; rx_pkts[idx_0]->hash.fdir.hi = _mm256_extract_epi32(desc_fdir_data, 0); rx_pkts[idx_1]->hash.fdir.hi = _mm256_extract_epi32(desc_fdir_data, 4); /* Create mbuf flags as required for mbuf_flags layout * (That's high lane [1,3,5,7, 0,2,4,6] as u32 lanes). * Approach: * - Mask away bits not required from the fdir_mask * - Leave the PKT_FDIR_ID bit (1 << 13) * - Position that bit correctly based on packet number * - OR in the resulting bit to mbuf_flags */ RTE_BUILD_BUG_ON(PKT_RX_FDIR_ID != (1 << 13)); __m256i mbuf_flag_mask = _mm256_set_epi32(0, 0, 0, 1 << 13, 0, 0, 0, 1 << 13); __m256i desc_flag_bit = _mm256_and_si256(mbuf_flag_mask, fdir_mask); /* For static-inline function, this will be stripped out * as the desc_idx is a hard-coded constant. */ switch (desc_idx) { case 0: return _mm256_alignr_epi8(desc_flag_bit, desc_flag_bit, 4); case 2: return _mm256_alignr_epi8(desc_flag_bit, desc_flag_bit, 8); case 4: return _mm256_alignr_epi8(desc_flag_bit, desc_flag_bit, 12); case 6: return desc_flag_bit; default: break; } /* NOT REACHED, see above switch returns */ return _mm256_setzero_si256(); } #endif /* RTE_LIBRTE_I40E_16BYTE_RX_DESC */ #define PKTLEN_SHIFT 10 /* Force inline as some compilers will not inline by default. */ static __rte_always_inline uint16_t _recv_raw_pkts_vec_avx512(struct i40e_rx_queue *rxq, struct rte_mbuf **rx_pkts, uint16_t nb_pkts, uint8_t *split_packet) { const uint32_t *ptype_tbl = rxq->vsi->adapter->ptype_tbl; const __m256i mbuf_init = _mm256_set_epi64x(0, 0, 0, rxq->mbuf_initializer); struct i40e_rx_entry *sw_ring = &rxq->sw_ring[rxq->rx_tail]; volatile union i40e_rx_desc *rxdp = rxq->rx_ring + rxq->rx_tail; rte_prefetch0(rxdp); /* nb_pkts has to be floor-aligned to RTE_I40E_DESCS_PER_LOOP_AVX */ nb_pkts = RTE_ALIGN_FLOOR(nb_pkts, RTE_I40E_DESCS_PER_LOOP_AVX); /* See if we need to rearm the RX queue - gives the prefetch a bit * of time to act */ if (rxq->rxrearm_nb > RTE_I40E_RXQ_REARM_THRESH) i40e_rxq_rearm(rxq); /* Before we start moving massive data around, check to see if * there is actually a packet available */ if (!(rxdp->wb.qword1.status_error_len & rte_cpu_to_le_32(1 << I40E_RX_DESC_STATUS_DD_SHIFT))) return 0; /* constants used in processing loop */ const __m512i crc_adjust = _mm512_set4_epi32 (0, /* ignore non-length fields */ -rxq->crc_len, /* sub crc on data_len */ -rxq->crc_len, /* sub crc on pkt_len */ 0 /* ignore non-length fields */ ); /* 8 packets DD mask, LSB in each 32-bit value */ const __m256i dd_check = _mm256_set1_epi32(1); /* 8 packets EOP mask, second-LSB in each 32-bit value */ const __m256i eop_check = _mm256_slli_epi32(dd_check, I40E_RX_DESC_STATUS_EOF_SHIFT); /* mask to shuffle from desc. to mbuf (2 descriptors)*/ const __m512i shuf_msk = _mm512_set4_epi32 (/* rss hash parsed separately */ /* octet 4~7, 32bits rss */ 7 << 24 | 6 << 16 | 5 << 8 | 4, /* octet 2~3, low 16 bits vlan_macip */ /* octet 14~15, 16 bits data_len */ 3 << 24 | 2 << 16 | 15 << 8 | 14, /* skip hi 16 bits pkt_len, zero out */ /* octet 14~15, 16 bits pkt_len */ 0xFFFF << 16 | 15 << 8 | 14, /* pkt_type set as unknown */ 0xFFFFFFFF ); /* compile-time check the above crc and shuffle layout is correct. * NOTE: the first field (lowest address) is given last in set_epi * calls above. */ RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, pkt_len) != offsetof(struct rte_mbuf, rx_descriptor_fields1) + 4); RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, data_len) != offsetof(struct rte_mbuf, rx_descriptor_fields1) + 8); RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, vlan_tci) != offsetof(struct rte_mbuf, rx_descriptor_fields1) + 10); RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, hash) != offsetof(struct rte_mbuf, rx_descriptor_fields1) + 12); /* Status/Error flag masks */ /* mask everything except RSS, flow director and VLAN flags * bit2 is for VLAN tag, bit11 for flow director indication * bit13:12 for RSS indication. Bits 3-5 of error * field (bits 22-24) are for IP/L4 checksum errors */ const __m256i flags_mask = _mm256_set1_epi32 ((1 << 2) | (1 << 11) | (3 << 12) | (7 << 22)); /* data to be shuffled by result of flag mask. If VLAN bit is set, * (bit 2), then position 4 in this array will be used in the * destination */ const __m256i vlan_flags_shuf = _mm256_set_epi32 (0, 0, PKT_RX_VLAN | PKT_RX_VLAN_STRIPPED, 0, 0, 0, PKT_RX_VLAN | PKT_RX_VLAN_STRIPPED, 0); /* data to be shuffled by result of flag mask, shifted down 11. * If RSS/FDIR bits are set, shuffle moves appropriate flags in * place. */ const __m256i rss_flags_shuf = _mm256_set_epi8 (0, 0, 0, 0, 0, 0, 0, 0, PKT_RX_RSS_HASH | PKT_RX_FDIR, PKT_RX_RSS_HASH, 0, 0, 0, 0, PKT_RX_FDIR, 0, /* end up 128-bits */ 0, 0, 0, 0, 0, 0, 0, 0, PKT_RX_RSS_HASH | PKT_RX_FDIR, PKT_RX_RSS_HASH, 0, 0, 0, 0, PKT_RX_FDIR, 0); /* data to be shuffled by the result of the flags mask shifted by 22 * bits. This gives use the l3_l4 flags. */ const __m256i l3_l4_flags_shuf = _mm256_set_epi8 (0, 0, 0, 0, 0, 0, 0, 0, /* shift right 1 bit to make sure it not exceed 255 */ (PKT_RX_EIP_CKSUM_BAD | PKT_RX_L4_CKSUM_BAD | PKT_RX_IP_CKSUM_BAD) >> 1, (PKT_RX_IP_CKSUM_GOOD | PKT_RX_EIP_CKSUM_BAD | PKT_RX_L4_CKSUM_BAD) >> 1, (PKT_RX_EIP_CKSUM_BAD | PKT_RX_IP_CKSUM_BAD) >> 1, (PKT_RX_IP_CKSUM_GOOD | PKT_RX_EIP_CKSUM_BAD) >> 1, (PKT_RX_L4_CKSUM_BAD | PKT_RX_IP_CKSUM_BAD) >> 1, (PKT_RX_IP_CKSUM_GOOD | PKT_RX_L4_CKSUM_BAD) >> 1, PKT_RX_IP_CKSUM_BAD >> 1, (PKT_RX_IP_CKSUM_GOOD | PKT_RX_L4_CKSUM_GOOD) >> 1, /* second 128-bits */ 0, 0, 0, 0, 0, 0, 0, 0, (PKT_RX_EIP_CKSUM_BAD | PKT_RX_L4_CKSUM_BAD | PKT_RX_IP_CKSUM_BAD) >> 1, (PKT_RX_IP_CKSUM_GOOD | PKT_RX_EIP_CKSUM_BAD | PKT_RX_L4_CKSUM_BAD) >> 1, (PKT_RX_EIP_CKSUM_BAD | PKT_RX_IP_CKSUM_BAD) >> 1, (PKT_RX_IP_CKSUM_GOOD | PKT_RX_EIP_CKSUM_BAD) >> 1, (PKT_RX_L4_CKSUM_BAD | PKT_RX_IP_CKSUM_BAD) >> 1, (PKT_RX_IP_CKSUM_GOOD | PKT_RX_L4_CKSUM_BAD) >> 1, PKT_RX_IP_CKSUM_BAD >> 1, (PKT_RX_IP_CKSUM_GOOD | PKT_RX_L4_CKSUM_GOOD) >> 1); const __m256i cksum_mask = _mm256_set1_epi32 (PKT_RX_IP_CKSUM_GOOD | PKT_RX_IP_CKSUM_BAD | PKT_RX_L4_CKSUM_GOOD | PKT_RX_L4_CKSUM_BAD | PKT_RX_EIP_CKSUM_BAD); uint16_t i, received; for (i = 0, received = 0; i < nb_pkts; i += RTE_I40E_DESCS_PER_LOOP_AVX, rxdp += RTE_I40E_DESCS_PER_LOOP_AVX) { /* step 1, copy over 8 mbuf pointers to rx_pkts array */ _mm256_storeu_si256((void *)&rx_pkts[i], _mm256_loadu_si256((void *)&sw_ring[i])); #ifdef RTE_ARCH_X86_64 _mm256_storeu_si256((void *)&rx_pkts[i + 4], _mm256_loadu_si256((void *)&sw_ring[i + 4])); #endif __m512i raw_desc0_3, raw_desc4_7; __m256i raw_desc0_1, raw_desc2_3, raw_desc4_5, raw_desc6_7; /* load in descriptors, in reverse order */ const __m128i raw_desc7 = _mm_load_si128((void *)(rxdp + 7)); rte_compiler_barrier(); const __m128i raw_desc6 = _mm_load_si128((void *)(rxdp + 6)); rte_compiler_barrier(); const __m128i raw_desc5 = _mm_load_si128((void *)(rxdp + 5)); rte_compiler_barrier(); const __m128i raw_desc4 = _mm_load_si128((void *)(rxdp + 4)); rte_compiler_barrier(); const __m128i raw_desc3 = _mm_load_si128((void *)(rxdp + 3)); rte_compiler_barrier(); const __m128i raw_desc2 = _mm_load_si128((void *)(rxdp + 2)); rte_compiler_barrier(); const __m128i raw_desc1 = _mm_load_si128((void *)(rxdp + 1)); rte_compiler_barrier(); const __m128i raw_desc0 = _mm_load_si128((void *)(rxdp + 0)); raw_desc6_7 = _mm256_inserti128_si256 (_mm256_castsi128_si256(raw_desc6), raw_desc7, 1); raw_desc4_5 = _mm256_inserti128_si256 (_mm256_castsi128_si256(raw_desc4), raw_desc5, 1); raw_desc2_3 = _mm256_inserti128_si256 (_mm256_castsi128_si256(raw_desc2), raw_desc3, 1); raw_desc0_1 = _mm256_inserti128_si256 (_mm256_castsi128_si256(raw_desc0), raw_desc1, 1); raw_desc4_7 = _mm512_inserti64x4 (_mm512_castsi256_si512(raw_desc4_5), raw_desc6_7, 1); raw_desc0_3 = _mm512_inserti64x4 (_mm512_castsi256_si512(raw_desc0_1), raw_desc2_3, 1); if (split_packet) { int j; for (j = 0; j < RTE_I40E_DESCS_PER_LOOP_AVX; j++) rte_mbuf_prefetch_part2(rx_pkts[i + j]); } /* convert descriptors 0-7 into mbufs, adjusting length and * re-arranging fields. Then write into the mbuf */ const __m512i len4_7 = _mm512_slli_epi32 (raw_desc4_7, PKTLEN_SHIFT); const __m512i len0_3 = _mm512_slli_epi32 (raw_desc0_3, PKTLEN_SHIFT); const __m512i desc4_7 = _mm512_mask_blend_epi16 (0x80808080, raw_desc4_7, len4_7); const __m512i desc0_3 = _mm512_mask_blend_epi16 (0x80808080, raw_desc0_3, len0_3); __m512i mb4_7 = _mm512_shuffle_epi8(desc4_7, shuf_msk); __m512i mb0_3 = _mm512_shuffle_epi8(desc0_3, shuf_msk); mb4_7 = _mm512_add_epi32(mb4_7, crc_adjust); mb0_3 = _mm512_add_epi32(mb0_3, crc_adjust); /* to get packet types, shift 64-bit values down 30 bits * and so ptype is in lower 8-bits in each */ const __m512i ptypes4_7 = _mm512_srli_epi64(desc4_7, 30); const __m512i ptypes0_3 = _mm512_srli_epi64(desc0_3, 30); const __m256i ptypes6_7 = _mm512_extracti64x4_epi64(ptypes4_7, 1); const __m256i ptypes4_5 = _mm512_extracti64x4_epi64(ptypes4_7, 0); const __m256i ptypes2_3 = _mm512_extracti64x4_epi64(ptypes0_3, 1); const __m256i ptypes0_1 = _mm512_extracti64x4_epi64(ptypes0_3, 0); const uint8_t ptype7 = _mm256_extract_epi8(ptypes6_7, 24); const uint8_t ptype6 = _mm256_extract_epi8(ptypes6_7, 8); const uint8_t ptype5 = _mm256_extract_epi8(ptypes4_5, 24); const uint8_t ptype4 = _mm256_extract_epi8(ptypes4_5, 8); const uint8_t ptype3 = _mm256_extract_epi8(ptypes2_3, 24); const uint8_t ptype2 = _mm256_extract_epi8(ptypes2_3, 8); const uint8_t ptype1 = _mm256_extract_epi8(ptypes0_1, 24); const uint8_t ptype0 = _mm256_extract_epi8(ptypes0_1, 8); const __m512i ptype4_7 = _mm512_set_epi32 (0, 0, 0, ptype_tbl[ptype7], 0, 0, 0, ptype_tbl[ptype6], 0, 0, 0, ptype_tbl[ptype5], 0, 0, 0, ptype_tbl[ptype4]); const __m512i ptype0_3 = _mm512_set_epi32 (0, 0, 0, ptype_tbl[ptype3], 0, 0, 0, ptype_tbl[ptype2], 0, 0, 0, ptype_tbl[ptype1], 0, 0, 0, ptype_tbl[ptype0]); mb4_7 = _mm512_mask_blend_epi32(0x1111, mb4_7, ptype4_7); mb0_3 = _mm512_mask_blend_epi32(0x1111, mb0_3, ptype0_3); __m256i mb4_5 = _mm512_extracti64x4_epi64(mb4_7, 0); __m256i mb6_7 = _mm512_extracti64x4_epi64(mb4_7, 1); __m256i mb0_1 = _mm512_extracti64x4_epi64(mb0_3, 0); __m256i mb2_3 = _mm512_extracti64x4_epi64(mb0_3, 1); /** * use permute/extract to get status content * After the operations, the packets status flags are in the * order (hi->lo): [1, 3, 5, 7, 0, 2, 4, 6] */ /* merge the status bits into one register */ const __m512i status_permute_msk = _mm512_set_epi32 (0, 0, 0, 0, 0, 0, 0, 0, 22, 30, 6, 14, 18, 26, 2, 10); const __m512i raw_status0_7 = _mm512_permutex2var_epi32 (desc4_7, status_permute_msk, desc0_3); __m256i status0_7 = _mm512_extracti64x4_epi64 (raw_status0_7, 0); /* now do flag manipulation */ /* get only flag/error bits we want */ const __m256i flag_bits = _mm256_and_si256(status0_7, flags_mask); /* set vlan and rss flags */ const __m256i vlan_flags = _mm256_shuffle_epi8(vlan_flags_shuf, flag_bits); const __m256i rss_fdir_bits = _mm256_srli_epi32(flag_bits, 11); const __m256i rss_flags = _mm256_shuffle_epi8(rss_flags_shuf, rss_fdir_bits); /* l3_l4_error flags, shuffle, then shift to correct adjustment * of flags in flags_shuf, and finally mask out extra bits */ __m256i l3_l4_flags = _mm256_shuffle_epi8(l3_l4_flags_shuf, _mm256_srli_epi32(flag_bits, 22)); l3_l4_flags = _mm256_slli_epi32(l3_l4_flags, 1); l3_l4_flags = _mm256_and_si256(l3_l4_flags, cksum_mask); /* merge flags */ __m256i mbuf_flags = _mm256_or_si256(l3_l4_flags, _mm256_or_si256(rss_flags, vlan_flags)); /* If the rxq has FDIR enabled, read and process the FDIR info * from the descriptor. This can cause more loads/stores, so is * not always performed. Branch over the code when not enabled. */ if (rxq->fdir_enabled) { #ifdef RTE_LIBRTE_I40E_16BYTE_RX_DESC /* 16B descriptor code path: * RSS and FDIR ID use the same offset in the desc, so * only one can be present at a time. The code below * identifies an FDIR ID match, and zeros the RSS value * in the mbuf on FDIR match to keep mbuf data clean. */ #define FDIR_BLEND_MASK ((1 << 3) | (1 << 7)) /* Flags: * - Take flags, shift bits to null out * - CMPEQ with known FDIR ID, to get 0xFFFF or 0 mask * - Strip bits from mask, leaving 0 or 1 for FDIR ID * - Merge with mbuf_flags */ /* FLM = 1, FLTSTAT = 0b01, (FLM | FLTSTAT) == 3. * Shift left by 28 to avoid having to mask. */ const __m256i fdir = _mm256_slli_epi32(rss_fdir_bits, 28); const __m256i fdir_id = _mm256_set1_epi32(3 << 28); /* As above, the fdir_mask to packet mapping is this: * order (hi->lo): [1, 3, 5, 7, 0, 2, 4, 6] * Then OR FDIR flags to mbuf_flags on FDIR ID hit. */ RTE_BUILD_BUG_ON(PKT_RX_FDIR_ID != (1 << 13)); const __m256i pkt_fdir_bit = _mm256_set1_epi32(1 << 13); const __m256i fdir_mask = _mm256_cmpeq_epi32(fdir, fdir_id); __m256i fdir_bits = _mm256_and_si256(fdir_mask, pkt_fdir_bit); mbuf_flags = _mm256_or_si256(mbuf_flags, fdir_bits); /* Based on FDIR_MASK, clear the RSS or FDIR value. * The FDIR ID value is masked to zero if not a hit, * otherwise the mb0_1 register RSS field is zeroed. */ const __m256i fdir_zero_mask = _mm256_setzero_si256(); __m256i tmp0_1 = _mm256_blend_epi32(fdir_zero_mask, fdir_mask, FDIR_BLEND_MASK); __m256i fdir_mb0_1 = _mm256_and_si256(mb0_1, fdir_mask); mb0_1 = _mm256_andnot_si256(tmp0_1, mb0_1); /* Write to mbuf: no stores to combine with, so just a * scalar store to push data here. */ rx_pkts[i + 0]->hash.fdir.hi = _mm256_extract_epi32(fdir_mb0_1, 3); rx_pkts[i + 1]->hash.fdir.hi = _mm256_extract_epi32(fdir_mb0_1, 7); /* Same as above, only shift the fdir_mask to align * the packet FDIR mask with the FDIR_ID desc lane. */ __m256i tmp2_3 = _mm256_alignr_epi8(fdir_mask, fdir_mask, 12); __m256i fdir_mb2_3 = _mm256_and_si256(mb2_3, tmp2_3); tmp2_3 = _mm256_blend_epi32(fdir_zero_mask, tmp2_3, FDIR_BLEND_MASK); mb2_3 = _mm256_andnot_si256(tmp2_3, mb2_3); rx_pkts[i + 2]->hash.fdir.hi = _mm256_extract_epi32(fdir_mb2_3, 3); rx_pkts[i + 3]->hash.fdir.hi = _mm256_extract_epi32(fdir_mb2_3, 7); __m256i tmp4_5 = _mm256_alignr_epi8(fdir_mask, fdir_mask, 8); __m256i fdir_mb4_5 = _mm256_and_si256(mb4_5, tmp4_5); tmp4_5 = _mm256_blend_epi32(fdir_zero_mask, tmp4_5, FDIR_BLEND_MASK); mb4_5 = _mm256_andnot_si256(tmp4_5, mb4_5); rx_pkts[i + 4]->hash.fdir.hi = _mm256_extract_epi32(fdir_mb4_5, 3); rx_pkts[i + 5]->hash.fdir.hi = _mm256_extract_epi32(fdir_mb4_5, 7); __m256i tmp6_7 = _mm256_alignr_epi8(fdir_mask, fdir_mask, 4); __m256i fdir_mb6_7 = _mm256_and_si256(mb6_7, tmp6_7); tmp6_7 = _mm256_blend_epi32(fdir_zero_mask, tmp6_7, FDIR_BLEND_MASK); mb6_7 = _mm256_andnot_si256(tmp6_7, mb6_7); rx_pkts[i + 6]->hash.fdir.hi = _mm256_extract_epi32(fdir_mb6_7, 3); rx_pkts[i + 7]->hash.fdir.hi = _mm256_extract_epi32(fdir_mb6_7, 7); /* End of 16B descriptor handling */ #else /* 32B descriptor FDIR ID mark handling. Returns bits * to be OR-ed into the mbuf olflags. */ __m256i fdir_add_flags; fdir_add_flags = desc_fdir_processing_32b(rxdp, rx_pkts, i, 0); mbuf_flags = _mm256_or_si256(mbuf_flags, fdir_add_flags); fdir_add_flags = desc_fdir_processing_32b(rxdp, rx_pkts, i, 2); mbuf_flags = _mm256_or_si256(mbuf_flags, fdir_add_flags); fdir_add_flags = desc_fdir_processing_32b(rxdp, rx_pkts, i, 4); mbuf_flags = _mm256_or_si256(mbuf_flags, fdir_add_flags); fdir_add_flags = desc_fdir_processing_32b(rxdp, rx_pkts, i, 6); mbuf_flags = _mm256_or_si256(mbuf_flags, fdir_add_flags); /* End 32B desc handling */ #endif /* RTE_LIBRTE_I40E_16BYTE_RX_DESC */ } /* if() on FDIR enabled */ /* At this point, we have the 8 sets of flags in the low 16-bits * of each 32-bit value in vlan0. * We want to extract these, and merge them with the mbuf init data * so we can do a single write to the mbuf to set the flags * and all the other initialization fields. Extracting the * appropriate flags means that we have to do a shift and blend for * each mbuf before we do the write. However, we can also * add in the previously computed rx_descriptor fields to * make a single 256-bit write per mbuf */ /* check the structure matches expectations */ RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, ol_flags) != offsetof(struct rte_mbuf, rearm_data) + 8); RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, rearm_data) != RTE_ALIGN(offsetof(struct rte_mbuf, rearm_data), 16)); /* build up data and do writes */ __m256i rearm0, rearm1, rearm2, rearm3, rearm4, rearm5, rearm6, rearm7; rearm6 = _mm256_blend_epi32 (mbuf_init, _mm256_slli_si256(mbuf_flags, 8), 0x04); rearm4 = _mm256_blend_epi32 (mbuf_init, _mm256_slli_si256(mbuf_flags, 4), 0x04); rearm2 = _mm256_blend_epi32 (mbuf_init, mbuf_flags, 0x04); rearm0 = _mm256_blend_epi32 (mbuf_init, _mm256_srli_si256(mbuf_flags, 4), 0x04); /* permute to add in the rx_descriptor e.g. rss fields */ rearm6 = _mm256_permute2f128_si256(rearm6, mb6_7, 0x20); rearm4 = _mm256_permute2f128_si256(rearm4, mb4_5, 0x20); rearm2 = _mm256_permute2f128_si256(rearm2, mb2_3, 0x20); rearm0 = _mm256_permute2f128_si256(rearm0, mb0_1, 0x20); /* write to mbuf */ _mm256_storeu_si256 ((__m256i *)&rx_pkts[i + 6]->rearm_data, rearm6); _mm256_storeu_si256 ((__m256i *)&rx_pkts[i + 4]->rearm_data, rearm4); _mm256_storeu_si256 ((__m256i *)&rx_pkts[i + 2]->rearm_data, rearm2); _mm256_storeu_si256 ((__m256i *)&rx_pkts[i + 0]->rearm_data, rearm0); /* repeat for the odd mbufs */ const __m256i odd_flags = _mm256_castsi128_si256 (_mm256_extracti128_si256(mbuf_flags, 1)); rearm7 = _mm256_blend_epi32 (mbuf_init, _mm256_slli_si256(odd_flags, 8), 0x04); rearm5 = _mm256_blend_epi32 (mbuf_init, _mm256_slli_si256(odd_flags, 4), 0x04); rearm3 = _mm256_blend_epi32 (mbuf_init, odd_flags, 0x04); rearm1 = _mm256_blend_epi32 (mbuf_init, _mm256_srli_si256(odd_flags, 4), 0x04); /* since odd mbufs are already in hi 128-bits use blend */ rearm7 = _mm256_blend_epi32(rearm7, mb6_7, 0xF0); rearm5 = _mm256_blend_epi32(rearm5, mb4_5, 0xF0); rearm3 = _mm256_blend_epi32(rearm3, mb2_3, 0xF0); rearm1 = _mm256_blend_epi32(rearm1, mb0_1, 0xF0); /* again write to mbufs */ _mm256_storeu_si256 ((__m256i *)&rx_pkts[i + 7]->rearm_data, rearm7); _mm256_storeu_si256 ((__m256i *)&rx_pkts[i + 5]->rearm_data, rearm5); _mm256_storeu_si256 ((__m256i *)&rx_pkts[i + 3]->rearm_data, rearm3); _mm256_storeu_si256 ((__m256i *)&rx_pkts[i + 1]->rearm_data, rearm1); /* extract and record EOP bit */ if (split_packet) { const __m128i eop_mask = _mm_set1_epi16 (1 << I40E_RX_DESC_STATUS_EOF_SHIFT); const __m256i eop_bits256 = _mm256_and_si256(status0_7, eop_check); /* pack status bits into a single 128-bit register */ const __m128i eop_bits = _mm_packus_epi32 (_mm256_castsi256_si128(eop_bits256), _mm256_extractf128_si256(eop_bits256, 1)); /* flip bits, and mask out the EOP bit, which is now * a split-packet bit i.e. !EOP, rather than EOP one. */ __m128i split_bits = _mm_andnot_si128(eop_bits, eop_mask); /* eop bits are out of order, so we need to shuffle them * back into order again. In doing so, only use low 8 * bits, which acts like another pack instruction * The original order is (hi->lo): 1,3,5,7,0,2,4,6 * [Since we use epi8, the 16-bit positions are * multiplied by 2 in the eop_shuffle value.] */ __m128i eop_shuffle = _mm_set_epi8 (0xFF, 0xFF, 0xFF, 0xFF, /* zero hi 64b */ 0xFF, 0xFF, 0xFF, 0xFF, 8, 0, 10, 2, /* move values to lo 64b */ 12, 4, 14, 6); split_bits = _mm_shuffle_epi8(split_bits, eop_shuffle); *(uint64_t *)split_packet = _mm_cvtsi128_si64(split_bits); split_packet += RTE_I40E_DESCS_PER_LOOP_AVX; } /* perform dd_check */ status0_7 = _mm256_and_si256(status0_7, dd_check); status0_7 = _mm256_packs_epi32 (status0_7, _mm256_setzero_si256()); uint64_t burst = __builtin_popcountll (_mm_cvtsi128_si64 (_mm256_extracti128_si256 (status0_7, 1))); burst += __builtin_popcountll(_mm_cvtsi128_si64 (_mm256_castsi256_si128(status0_7))); received += burst; if (burst != RTE_I40E_DESCS_PER_LOOP_AVX) break; } /* update tail pointers */ rxq->rx_tail += received; rxq->rx_tail &= (rxq->nb_rx_desc - 1); if ((rxq->rx_tail & 1) == 1 && received > 1) { /* keep avx2 aligned */ rxq->rx_tail--; received--; } rxq->rxrearm_nb += received; return received; } /** * Notice: * - nb_pkts < RTE_I40E_DESCS_PER_LOOP, just return no packet */ uint16_t i40e_recv_pkts_vec_avx512(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts) { return _recv_raw_pkts_vec_avx512(rx_queue, rx_pkts, nb_pkts, NULL); } /** * vPMD receive routine that reassembles single burst of 32 scattered packets * Notice: * - nb_pkts < RTE_I40E_DESCS_PER_LOOP, just return no packet */ static uint16_t i40e_recv_scattered_burst_vec_avx512(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts) { struct i40e_rx_queue *rxq = rx_queue; uint8_t split_flags[RTE_I40E_VPMD_RX_BURST] = {0}; /* get some new buffers */ uint16_t nb_bufs = _recv_raw_pkts_vec_avx512(rxq, rx_pkts, nb_pkts, split_flags); if (nb_bufs == 0) return 0; /* happy day case, full burst + no packets to be joined */ const uint64_t *split_fl64 = (uint64_t *)split_flags; if (!rxq->pkt_first_seg && split_fl64[0] == 0 && split_fl64[1] == 0 && split_fl64[2] == 0 && split_fl64[3] == 0) return nb_bufs; /* reassemble any packets that need reassembly*/ unsigned int i = 0; if (!rxq->pkt_first_seg) { /* find the first split flag, and only reassemble then*/ while (i < nb_bufs && !split_flags[i]) i++; if (i == nb_bufs) return nb_bufs; rxq->pkt_first_seg = rx_pkts[i]; } return i + reassemble_packets(rxq, &rx_pkts[i], nb_bufs - i, &split_flags[i]); } /** * vPMD receive routine that reassembles scattered packets. * Main receive routine that can handle arbitrary burst sizes * Notice: * - nb_pkts < RTE_I40E_DESCS_PER_LOOP, just return no packet */ uint16_t i40e_recv_scattered_pkts_vec_avx512(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts) { uint16_t retval = 0; while (nb_pkts > RTE_I40E_VPMD_RX_BURST) { uint16_t burst = i40e_recv_scattered_burst_vec_avx512(rx_queue, rx_pkts + retval, RTE_I40E_VPMD_RX_BURST); retval += burst; nb_pkts -= burst; if (burst < RTE_I40E_VPMD_RX_BURST) return retval; } return retval + i40e_recv_scattered_burst_vec_avx512(rx_queue, rx_pkts + retval, nb_pkts); } static __rte_always_inline int i40e_tx_free_bufs_avx512(struct i40e_tx_queue *txq) { struct i40e_vec_tx_entry *txep; uint32_t n; uint32_t i; int nb_free = 0; struct rte_mbuf *m, *free[RTE_I40E_TX_MAX_FREE_BUF_SZ]; /* check DD bits on threshold descriptor */ if ((txq->tx_ring[txq->tx_next_dd].cmd_type_offset_bsz & rte_cpu_to_le_64(I40E_TXD_QW1_DTYPE_MASK)) != rte_cpu_to_le_64(I40E_TX_DESC_DTYPE_DESC_DONE)) return 0; n = txq->tx_rs_thresh; /* first buffer to free from S/W ring is at index * tx_next_dd - (tx_rs_thresh-1) */ txep = (void *)txq->sw_ring; txep += txq->tx_next_dd - (n - 1); if (txq->offloads & DEV_TX_OFFLOAD_MBUF_FAST_FREE && (n & 31) == 0) { struct rte_mempool *mp = txep[0].mbuf->pool; void **cache_objs; struct rte_mempool_cache *cache = rte_mempool_default_cache(mp, rte_lcore_id()); if (!cache || cache->len == 0) goto normal; cache_objs = &cache->objs[cache->len]; if (n > RTE_MEMPOOL_CACHE_MAX_SIZE) { rte_mempool_ops_enqueue_bulk(mp, (void *)txep, n); goto done; } /* The cache follows the following algorithm * 1. Add the objects to the cache * 2. Anything greater than the cache min value (if it * crosses the cache flush threshold) is flushed to the ring. */ /* Add elements back into the cache */ uint32_t copied = 0; /* n is multiple of 32 */ while (copied < n) { const __m512i a = _mm512_load_si512(&txep[copied]); const __m512i b = _mm512_load_si512(&txep[copied + 8]); const __m512i c = _mm512_load_si512(&txep[copied + 16]); const __m512i d = _mm512_load_si512(&txep[copied + 24]); _mm512_storeu_si512(&cache_objs[copied], a); _mm512_storeu_si512(&cache_objs[copied + 8], b); _mm512_storeu_si512(&cache_objs[copied + 16], c); _mm512_storeu_si512(&cache_objs[copied + 24], d); copied += 32; } cache->len += n; if (cache->len >= cache->flushthresh) { rte_mempool_ops_enqueue_bulk (mp, &cache->objs[cache->size], cache->len - cache->size); cache->len = cache->size; } goto done; } normal: m = rte_pktmbuf_prefree_seg(txep[0].mbuf); if (likely(m)) { free[0] = m; nb_free = 1; for (i = 1; i < n; i++) { rte_prefetch0(&txep[i + 3].mbuf->cacheline1); m = rte_pktmbuf_prefree_seg(txep[i].mbuf); if (likely(m)) { if (likely(m->pool == free[0]->pool)) { free[nb_free++] = m; } else { rte_mempool_put_bulk(free[0]->pool, (void *)free, nb_free); free[0] = m; nb_free = 1; } } } rte_mempool_put_bulk(free[0]->pool, (void **)free, nb_free); } else { for (i = 1; i < n; i++) { m = rte_pktmbuf_prefree_seg(txep[i].mbuf); if (m) rte_mempool_put(m->pool, m); } } done: /* buffers were freed, update counters */ txq->nb_tx_free = (uint16_t)(txq->nb_tx_free + txq->tx_rs_thresh); txq->tx_next_dd = (uint16_t)(txq->tx_next_dd + txq->tx_rs_thresh); if (txq->tx_next_dd >= txq->nb_tx_desc) txq->tx_next_dd = (uint16_t)(txq->tx_rs_thresh - 1); return txq->tx_rs_thresh; } static inline void vtx1(volatile struct i40e_tx_desc *txdp, struct rte_mbuf *pkt, uint64_t flags) { uint64_t high_qw = (I40E_TX_DESC_DTYPE_DATA | ((uint64_t)flags << I40E_TXD_QW1_CMD_SHIFT) | ((uint64_t)pkt->data_len << I40E_TXD_QW1_TX_BUF_SZ_SHIFT)); __m128i descriptor = _mm_set_epi64x(high_qw, pkt->buf_iova + pkt->data_off); _mm_store_si128((__m128i *)txdp, descriptor); } static inline void vtx(volatile struct i40e_tx_desc *txdp, struct rte_mbuf **pkt, uint16_t nb_pkts, uint64_t flags) { const uint64_t hi_qw_tmpl = (I40E_TX_DESC_DTYPE_DATA | ((uint64_t)flags << I40E_TXD_QW1_CMD_SHIFT)); for (; nb_pkts > 3; txdp += 4, pkt += 4, nb_pkts -= 4) { uint64_t hi_qw3 = hi_qw_tmpl | ((uint64_t)pkt[3]->data_len << I40E_TXD_QW1_TX_BUF_SZ_SHIFT); uint64_t hi_qw2 = hi_qw_tmpl | ((uint64_t)pkt[2]->data_len << I40E_TXD_QW1_TX_BUF_SZ_SHIFT); uint64_t hi_qw1 = hi_qw_tmpl | ((uint64_t)pkt[1]->data_len << I40E_TXD_QW1_TX_BUF_SZ_SHIFT); uint64_t hi_qw0 = hi_qw_tmpl | ((uint64_t)pkt[0]->data_len << I40E_TXD_QW1_TX_BUF_SZ_SHIFT); __m512i desc0_3 = _mm512_set_epi64 (hi_qw3, pkt[3]->buf_iova + pkt[3]->data_off, hi_qw2, pkt[2]->buf_iova + pkt[2]->data_off, hi_qw1, pkt[1]->buf_iova + pkt[1]->data_off, hi_qw0, pkt[0]->buf_iova + pkt[0]->data_off); _mm512_storeu_si512((void *)txdp, desc0_3); } /* do any last ones */ while (nb_pkts) { vtx1(txdp, *pkt, flags); txdp++, pkt++, nb_pkts--; } } static __rte_always_inline void tx_backlog_entry_avx512(struct i40e_vec_tx_entry *txep, struct rte_mbuf **tx_pkts, uint16_t nb_pkts) { int i; for (i = 0; i < (int)nb_pkts; ++i) txep[i].mbuf = tx_pkts[i]; } static inline uint16_t i40e_xmit_fixed_burst_vec_avx512(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts) { struct i40e_tx_queue *txq = (struct i40e_tx_queue *)tx_queue; volatile struct i40e_tx_desc *txdp; struct i40e_vec_tx_entry *txep; uint16_t n, nb_commit, tx_id; uint64_t flags = I40E_TD_CMD; uint64_t rs = I40E_TX_DESC_CMD_RS | I40E_TD_CMD; /* cross rx_thresh boundary is not allowed */ nb_pkts = RTE_MIN(nb_pkts, txq->tx_rs_thresh); if (txq->nb_tx_free < txq->tx_free_thresh) i40e_tx_free_bufs_avx512(txq); nb_commit = nb_pkts = (uint16_t)RTE_MIN(txq->nb_tx_free, nb_pkts); if (unlikely(nb_pkts == 0)) return 0; tx_id = txq->tx_tail; txdp = &txq->tx_ring[tx_id]; txep = (void *)txq->sw_ring; txep += tx_id; txq->nb_tx_free = (uint16_t)(txq->nb_tx_free - nb_pkts); n = (uint16_t)(txq->nb_tx_desc - tx_id); if (nb_commit >= n) { tx_backlog_entry_avx512(txep, tx_pkts, n); vtx(txdp, tx_pkts, n - 1, flags); tx_pkts += (n - 1); txdp += (n - 1); vtx1(txdp, *tx_pkts++, rs); nb_commit = (uint16_t)(nb_commit - n); tx_id = 0; txq->tx_next_rs = (uint16_t)(txq->tx_rs_thresh - 1); /* avoid reach the end of ring */ txdp = txq->tx_ring; txep = (void *)txq->sw_ring; } tx_backlog_entry_avx512(txep, tx_pkts, nb_commit); vtx(txdp, tx_pkts, nb_commit, flags); tx_id = (uint16_t)(tx_id + nb_commit); if (tx_id > txq->tx_next_rs) { txq->tx_ring[txq->tx_next_rs].cmd_type_offset_bsz |= rte_cpu_to_le_64(((uint64_t)I40E_TX_DESC_CMD_RS) << I40E_TXD_QW1_CMD_SHIFT); txq->tx_next_rs = (uint16_t)(txq->tx_next_rs + txq->tx_rs_thresh); } txq->tx_tail = tx_id; I40E_PCI_REG_WC_WRITE(txq->qtx_tail, txq->tx_tail); return nb_pkts; } uint16_t i40e_xmit_pkts_vec_avx512(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts) { uint16_t nb_tx = 0; struct i40e_tx_queue *txq = (struct i40e_tx_queue *)tx_queue; while (nb_pkts) { uint16_t ret, num; num = (uint16_t)RTE_MIN(nb_pkts, txq->tx_rs_thresh); ret = i40e_xmit_fixed_burst_vec_avx512 (tx_queue, &tx_pkts[nb_tx], num); nb_tx += ret; nb_pkts -= ret; if (ret < num) break; } return nb_tx; }